mine said "seniors can't afford tour four more years of obama budget cuts to medicare." that's arguable, they're not really cuts, but point is you don't know where it's coming from. a virginia company is behind it. its conservative clients are distancing themselvess from having anything to do with these anonymous text messages. >> warner: are the campaigns themselves using these methods to get out negative messages at this stage or are they all positive? >> they are not all positive by any means. the campaigns have web site which is n which president obama's people attack mitt romney and vice versa. so it's a mix of trying to identify your supporters and get them to register, get them to tell their friends, get them to tell people on facebook and also driving negative messages, sometimings snarky twitter-type messages against the other guy and using a technique called data mining. >> warner: tell us about that, because we had a couple interesting pieces that harry did in connection with "frontline" about what sorts of information the campaigns collect on potential voters